Park University natural disasters

Evidence for the impact that occurred near chicxulub

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91. Evidence for the impact that occurred near Chicxulub, Mexico, includes all but which of the following?  A. quartz grains with shocked crystal structures, indicating a short and violent impact B. iridium anomaly at roughly 100 sites worldwide in a thin layer of rock 65 million years old C. sand-sized spherules of minerals suggesting a melting and resolidification of rock D. large pieces of meteorite found in Mexico E. The K/T boundary clays have a different composition from clays in the limestone layers above  and below it; they might be explained by a mixture of one part asteroid to ten parts Earth crust 17
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GO125Natural Disasters, Final exam, CS Verma Park University 92.  Likely effects of the Cretaceous-Tertiary boundary impact include all but which of the following?  93. Relatively few impact craters have been discovered on Earth because _______________.  94. Evidence demonstrating that the crater in Arizona formed by meteorite impact includes all but which of  the following?  95. The solar system is surrounded by the Oort cloud composed of about a trillion comets, icy objects with  orbits that take them far beyond the outermost planets of our solar system.  A. TRUE B. FALSE 96. Some students in this class will likely live long enough to see a return of Halley's Comet.  A. TRUE B. FALSE  
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